Mots-clés
Biais statistique Bilan de masse Donnée climatique Effet orographique Glacier Interpolation Modèle Montagne Norvège Précipitation Température Variabilité climatique Climatic data Climatic variability Glacier Glacier mass balance Interpolation Model Mountain Norway Orographic effect Precipitation Statistical bias Temperature Balance de masa Dato climático Efecto orográfico Helero Interpolación Modelo Montaña Noruega Precipitación Sesgo estadístico Temperatura Variabilidad climáticaEvaluation of gridded precipitation for Norway using glacier mass-balance measurements
Auteur(s) et Affiliation(s)
ENGELHARDT, M.
Dep. of Geosciences, Physical Geography, Univ., Oslo, Norvege
SCHULER, T.V.
Dep. of Geosciences, Physical Geography, Univ., Oslo, Norvege
ANDREASSEN, L.M.
Norwegian Water Resources and Energy Directorate (NVE), Oslo, Norvege
Description :
Using gridded temperature and precipitation data from the service seNorge, surface mass balance was modeled for 5 Norwegian glaciers of different size and climate conditions. The model accounts for melting of snow and ice by applying a degree-day approach and considers refreezing assuming a snow depth depended storage. Calculated values are compared to point measurements of glacier winter mass balance. On average for each glacier, modeled and measured surface mass-balance evolutions agree well, but results at individual stake locations show large variability. Two types of problems were identified : first, grid data were not able to capture spatial mass balance variability at smaller glaciers. Second, a significant increase in the bias between model and observations with altitude for one glacier suggested that orographic enhancement of precipitation was not appropriately captured by the gridded interpolation.
Type de document :
Article de périodique
Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2012, vol. 94, n°. 4, p. 501-509, nombre de pages : 9, Références bibliographiques : 21 ref.
Date :
2012
Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)